shoulder belts in a 75????

[crossy]

This Chevy 75 pickup I bought had no shoulder belts or even the mount to put them. I really don’t want to think about welding anything into the upper posts and having to put a hole in the headliner trim. Right now it does not even have the lap belts in it so before I hunt for . It was mentioned to me that an early 70’s blazer had lower mounting points for the shoulder harness. Does anyone here have any experience with putting those blazer belts in the pickups. I wanted to know before I try to locate a pair of belts. I would be willing to ‘add’ a mount below the trim. It’s not just a matter of safety here. I hate that the cops stop me NOW for not having a shoulder belt on when im driving my 73 Pinto. The truck ‘looks’ newer than the pinto and with the arrest-me-red color I’ll be getting stopped all the time hoping they can get some fine money. They are bad about that here. thanx, crossy